Khun Dan Prakarn Chon Dam is built across Khlong Tha Dan in Nakhon Nayok Province. The dam has supplied water for agriculture to irrigated areas of more than 185,000 rai in Nakhon Nayok Province. It can reduce damages caused by flood in the watershed area of Nakhon Nayok, wash away the surface of acid soil, generate more agricultural production in irrigated area and use water for consumption.